Regulating-valve for drill-feeding means



H. l. STAGE. REGULATING VALVE FOR DRILL FEEDING MEANS- APPLICATION FILED OCT-. 23, I919.

Patented Dec. 7, 1920.

INVENTOR.

UNITED STATES, PATENT OFFICE.

HAROLD I.' STAGE, or nnsromrmmsynvmm, VA'SSIGNOR 'ro INGERSOLL-RAND coMrnNY, or. JERSEY CITY, NEW JERSEY, A CORPORATION or NEW JEnsEY.

BEGULATING-VALVE FOR To all whom it may concern:

Be it known that I, HAROLD I. STAGE, a citizen of the United States, residing at Easton, in the county of Northampton and State of Pennsylvania, have invented a certain new and useful Improvement in Regulating-Va'lves for Drill-Feeding Means, 4 of which the following is a specification.

This invention relates to a class'of rock drills known as stopers and in particular to a valve construction for maintaining a constantly regulated pressure in the feed cylinder for holding the drillup the rock when it is in operation. p The objects of the present invention are to provide a valve between the fluid pressure supply and the feed cylinder which willenable the operator to control the'pressure exerted within the feed cylinder to force,- the drill upwardly to the work. A further object of the invention is t0' make this valve in a form which will be compact, readily operated by the workman and one which will enable the pressure within the feeding cylinder to be maintained at a constant pressure, when the valve has been set .by the operator, within very close. limits regardless of the character of rdckbeing drilled;

With the aboveijand other objects in view my invention consists in the features of construction and operationset forth in the following specification.

In the drawings annexed hereto and formin a part hereof: (a Y %igure 1 showsan outside view in-elevation of a complete stoper or air feed drill 'eprovided withc the present invention,

' Fig. 2, an elevation in cross section of the complete valve structure forming the subject matter of the present invention;

Fig. 3, a portion of the stoper with parts broken away to. show the fluid'pressure supply, the throttle valve, and the position of the regulating valve relative thereto;

Fig. 4', a view taken on lines 44 of Fig. 2.

Fig. 5, a section taken along lines of Fig. '6, a view ofthe regulating valve forming apart of my invention, Figs. 7 and 8, cross sectional views of theregulating valve takenon lines 7- -7 -and' '8'8 respectively.

Ref "'rring more particularly to the figures ofthe drawing, .1 refersto the hammer cyl-- Specification of Letters Patent.

Application filed October 23,

- ner.

DRILL-FEEDING MEANS.

Patented Dec. 7,1920.

1919 Serial No. 332,645.

l inder of a stoper which may be of any well known type, that shown being 'of the ham mer drill type with handrotating means shown at 2. At 3 is-shown the feed cylinder which is of theusual type containing a piston or plunger forcing the point 4 away from the cylinder 3 when pressure is admltted at the upper end of the cylinder. The throttle valve shown at 5 receives its supply of fluid pressure through conduits 6 and 6 in the usual manner.

Indrilling different types of rock the pressure with which the drill is heldagainst the work must necessarily be varied within rather wide limits to obtain the most effective drilling, especially is this so when seamy rock is being operated on, and when the type tain the pressure within the feed cylinder 3-at any pressure desired under control of. the operator without regard to the rapidity of drilling or type'of rock being drilled. This isalocpmplished in the following man:

The throttle valve 5 is shown provided with a radial passage 7 which, when in its open position as shown in Fig. 3 per- .mits fluid to pass directly from the supply conduit 6 into passages 8 as shown in ig 2. Passing through the passages or con- (luit 8 the fluid passes through block 9 past a valve 10 shown in Fig. 2 in open position which is its normal position, as will hereinafter appear. The fluid the-n enters cavity 11 and thence into conduit 12 and into the cylinder pressure cavity 13 within the feed cylinder 3.

Within the cavity 11 a plunger 14 'is'pro vided pressed toward.the'left by means of a spring 15,its forward face presslng against one end of -'the valve-10 and tending to hold it in open position againsta-spring 16 which surrounds the valve 10 and exerts relatively light pressure tending to force it into closed position. ,Inserted within-the cavity 11 is a screw .plug 17 carrying a threaded bolt 18,

rotation of which moves forwardly or back the nut 19- which*-: is mounted upon the threaded portion ofbolt 18.- The nut 19 is restrained from rotating by means. of flutes and recesses shown respectivelyat 20 and 21 in Fig. 4%. Rotation of the bolt is accom-' 25 the pressure again drops within the pli shedby means of winged nut 22 which forces the nut 19 forwardly and back varying the pressure exerted by spring 15 against- 14 tending to force it tothe right against pressure ofthe spring -15 and with movelo'wed to close. With the spring 15 adjusted to-a given ressure by the adjustment of nut 19 it will lie obvious thatia given pressure will just balance the pressure to hold the 15 valve in a closed position and that.when the pressure within cavity 11 is lower than that critical pressure the plunger 14 will move to the left thus 0 ening the valve 10 andpermitting a little uid to pass through .20 the flutes 10 provided in valve 10 and thus a being adapted to close when the .fluld withenter the pressure chamber 13,- andas-soon as the critical pressure'is reached in cavity .11, plunger 14 will be moved to the right and-thus the valve 10 will be closed until ressure chamber 13 and cavity 11. Shoul the pressure within cavity 11 increase above the.

writical pressure the plunger 14 will be moved to the right far enough to open the exhaust conduit '23 thus allowing some of the fluid within cavity 11 to escape. Inthe operation of. starting the drill the throttle valve is partially opened and as the valve 10 is initially and normally open .the 35 drill 1 is permitted to rise to the work and the hammer started inj'operation. as the drilling is started and the throttle opened to its fully opened .position, the pres- .sure of sprin may be readily ad'usted sired pressure 7 for feeding the drill forwardly and holding the drill against the rock is obtained within the-feed cylinder- 3=and as the drilling progresses this pressure may be-varied as desired, by simply rotating I the wing'nut 22 slightly to either increase or decrease. the pressure of spring 15. v

Valve -10 which is clearl .shownpin Figs.

6-7-Q-8, maybe made 0 anywell known i pass into cavity ll when in its open posi tion. The valveis notnecessarily fastened to the forward face of the plunger 14 as the pressure of light spring'16 and of,- the fluid pressure against the head of the valve will continuously. tend to forceit t0 its-closedf position to the right and hold it against tlie the valve open is exerted. when the force of spring l5 exceeds' the resisting force of the light spring 16 and the pressure in cavity 11, but this is the normal condition, and

95 the valve is adapted to close when the fluid 11 is exerted against the face of the plungerv ment of this plunger14'the valve '10 is al- Al's soon.

by rotation o the wing nut. 22 until't e de-'" plunger 14. 'A- force suflici'ent tojmaintain.

within the feed cylinder reaches a critical pressure greater than the force exerted in holding the valve open.

The above description discloses a construction which will regulate the supply of air into the feed cylinder 3 of a 'stope drill.

and maintain it at any desired constant pressure less than the full line throttle valve.

Having thus described my invention; what I'claim is:

1. In a pressure regulating device for rock drill feeding means, a normally open valve mounted on said drill independent of the throttle valve between said throttle and the feed cylinder of said drill, resilient means exerting relatively light pressure tending to force said regulating valve to closed position, and a piston resiliently pressed against said valve to hold it open,.s aid valve in the feed cylinder reaches a criticaL-pres sure greater than the force exerted in holding the valve open. 4

2. In a pressure regulatingdevice .for rock dri-llfeeding means, a normally .0 n va'lve pressure at the g mounted on said drill, ind'e end t of the throttle valve between said t rottle'and the feed cylinder. of said drill, resilient means exerting relatively light pressure tendin 'to force said regulating valve to closed-position,

"and-a] piston resiliently pressed against said valve to hold it open, said valve bei adapted to close when the fluid within the eed cylinder reaches a criticalpressure greatef than the force'exerted in holding the-valve o n,

and adapted to. open' an exhaustcon uit 3 --when the critical pressum is exceeded.

. 3. I-n a -ressure regulating device .for rock drill eeding'means, a-normallyopen sup ly and the feed cylinder of said drill, resi ient means exerting relatively light pressure tending to force said regulating.

1 valve"to closed position, a piston resiliently drill feedmgmeans, a normallyep'en regulating valve mounted between the fluid, supply-and the feed cylinder of said drill,'re-

- silient means exerting relatively light pres- "sure tending to force said re toclosed position, a piston resi l'ently pressed toward said valve to hold it open, said'valve lati'ng valve "bein adapted to/close when the fluid within.

the eed cylinder reaches a critical pressure greater than the fo'rce exerted in holding the valve open, and adapted to open-an exhaust conduit when the critical pressure is exceeded. Y 5. In a feed pressure regulating device'for' I regulating valve mounted between the fluid pressedtoward said valve to .hold it open, 1

a cavity, said piston.

' tion to open said] 'alve able spring pressure and forcedin ation to. close "said valve against saidtsgiring urged toward its closed eratmg afeed'pressure-regula V for rock drills, a no rock a normally open v lve in the conduit extending from the throttle valve to the feed cylinder, said valve being position by means 0 a spring exerting relatively light pressure and e1 7 in its open position by a pistonop within acavity, saidrpiston being forced in a direction to openmeans of adjustable spring ressure an forced in a direction to'close said valve when the pressure within said cavity. reaches a critical amount greater tha'nthe spring pres rted in holdingthe valve sure exe open.

once for rock drills, a normally open 'va ve inse in the conduit extending closed position by. rela .tively light resilient open position by a iston operating Within ing forced'in a dire ressure when the pressure within sai cavity and also-within said feed cylinder reaches a critical'amount. 7

7. In a feed maintaining means ally openyalve adapted to admit fluid to a feed cylinder on said drill when pressure in-said cylinder helow a critical and means comprising a. a piston movement 7 an exhaust conduit .35

of which opens and-closes which said valve maintains pressure within said feedcylinderr a Y 8. A pressurelregulating-deviee.for roekdrill mountedlbetween .the fluid supply the --feed.cyl inder of the drill, comprisingaca sing having a borem from the throttlevalve ,to the feed cylinder, said valve being 4 urged toward its pressure and held in its- -comprising by means of adjustthe piston exceedsthe to varv the pressure at .set my'hand,

communication at its sliding said bore, forcing the fr m the f communication from the source of vto' the'feed cylinder ando the piston when it moves mward' ue to the iimer g end with the isbon inward agai t l i d a valve o spring pressure exceeding thefeed c linder V ating device and adapted to open communication .fromthe feed cylinder thro h the said bore 120 the atmosphere, said port ing uncovered btthgegiston due to the fluid 'presure' from of 7 cylinder exthe spring pressure against the drill feeding means-mounted between the fluid supply andthe feed cylinder of the drill, aeasinghavingaboreincommunic'ation at. its inner der, 9. piston sliding forcing the piston mward against from the feedcyli'nder ports and 0 normally open to establish communication from the 'source of supply to the feed cylinsaid communlcation der, means for closing: v

the feed cylinderon when the pressure from theforce of the pressure n testimony whereof, I hereunto 9. A device for rock spring presure, ports; and passages normally closed but opened to I 'connect'the feed cylinder with the atgg? m "the feed cylinder on the piston comp -.r=.-= '.the said springflfarther .than is requ1red to close communication from the source of suppl'ytothe cylinder;

' meow-1; was.

in said bore, a spring so 4 BlldWlth thefeed-cylin- 

